| 摘要 |
PURPOSE:To simplify the construction by applying a fixed voltage to the input of the integration circuit of voltage proportional to the received signal level from target object through the antenna in a specified delay time from the start of rotation of the antenna driving motor. CONSTITUTION:A voltage A which is proportional to the received signal level after the detection 3 of the signal received from the target object through the antenna 1 is added by an addition circuit 5 with the output B inverted through a sample hold integration circuit 4. When the output C of the circuit 5 is below the given voltage or above the specified voltage in the opposite polarity, it is fed to comparators 6 and 6'. The rotation detecting signal from the circuit 6 and 6' is fed to a monostable multivibrators 7 and 7' for forming a delay time to produce the gate output of delay range. The output of the mono-stable multivibrators 7 and 7' is added to allow the sample hold switch S1 to be driven whatever output is detected. The output D of the monostable multivibrator 7' is fed to a reverse change-over circuit 9 of the antenna driving motors 15 and 16 whose output causes the switches S2 and S3 to be changed over through AZ/EL switching circuit 10. Thus, a specified integrating voltage is fed to the circuit 4. |
